| /** | |
| * This function parses the exported methods inside RCTBridgeModules and | |
| * generates an array of arrays of RCTModuleMethod objects, keyed | |
| * by module index. | |
| */ | |
| static RCTSparseArray *RCTExportedMethodsByModuleID(void) | |
| { | |
| static RCTSparseArray *methodsByModuleID; | |
| static dispatch_once_t onceToken; | |
| dispatch_once(&onceToken, ^{ | |
| Dl_info info; | |
| dladdr(&RCTExportedMethodsByModuleID, &info); | |
| #ifdef __LP64__ | |
| typedef uint64_t RCTExportValue; | |
| typedef struct section_64 RCTExportSection; | |
| #define RCTGetSectByNameFromHeader getsectbynamefromheader_64 | |
| #else | |
| typedef uint32_t RCTExportValue; | |
| typedef struct section RCTExportSection; | |
| #define RCTGetSectByNameFromHeader getsectbynamefromheader | |
| #endif | |
| const RCTExportValue mach_header = (RCTExportValue)info.dli_fbase; | |
| const RCTExportSection *section = RCTGetSectByNameFromHeader((void *)mach_header, "__DATA", "RCTExport"); | |
| if (section == NULL) { | |
| return; | |
| } | |
| NSArray *classes = RCTBridgeModuleClassesByModuleID(); | |
| NSMutableDictionary *methodsByModuleClassName = [NSMutableDictionary dictionaryWithCapacity:[classes count]]; | |
| for (RCTExportValue addr = section->offset; | |
| addr < section->offset + section->size; | |
| addr += sizeof(const char **) * 2) { | |
| // Get data entry | |
| const char **entries = (const char **)(mach_header + addr); | |
| // Create method | |
| RCTModuleMethod *moduleMethod = | |
| [[RCTModuleMethod alloc] initWithMethodName:@(entries[0]) | |
| JSMethodName:strlen(entries[1]) ? @(entries[1]) : nil]; | |
| // Cache method | |
| NSArray *methods = methodsByModuleClassName[moduleMethod.moduleClassName]; | |
| methodsByModuleClassName[moduleMethod.moduleClassName] = | |
| methods ? [methods arrayByAddingObject:moduleMethod] : @[moduleMethod]; | |
| } | |
| methodsByModuleID = [[RCTSparseArray alloc] initWithCapacity:[classes count]]; | |
| [classes enumerateObjectsUsingBlock:^(Class moduleClass, NSUInteger moduleID, BOOL *stop) { | |
| methodsByModuleID[moduleID] = methodsByModuleClassName[NSStringFromClass(moduleClass)]; | |
| }]; | |
| }); | |
| return methodsByModuleID; | |
| } |